by Mitch Battros - Earth Changes Media
Today's CME (coronal mass ejection) is measured to be low to moderate solar winds speed. A geomagnetic storm is expected to occur within the next 72 hours. On Sept. 19th another CME occurred during a prominence eruption and is expected to arrive at Earth within the next 48 hours.
Some CMEs are called "halo events" because of the way they look in coronagraph images. As the expanding cloud of an Earth-directed CME looms larger and larger it appears to envelop the Sun, forming a halo around our star. This animation shows a "full halo" coronal mass ejection recorded by SOHO coronagraphs.
